Machine for making automobile-bumpers.



D. G. MORGAN.

MACHINE FOR MAKING AUTOMOBILE BUMPERS.

APPLICATION FILED JUNE 20.1911.

1,266,975. Patented May 21,1918.

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WITNESSES: INVENTOR MM Jazz'cZ6f%;ya/z a f Z 7 uzffiw fiimm ATEOHNEYS D. G. MORGAN.

MACHINE FOR MAKING AUTOMOBILE BU MPERS.

APPLICATION FILED JUNE 20. 1911.

" 1,266,975. Patented May 21,1918.

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WITNESSES: v

INVENTOR FIQ.

DAVID G. MORGAN, OF SAN FRANCISCO, CALIFORNIA.

MACHINE FOR MAKING AUTOMOBILE-BUMPERS.

Specification of Letters Patent.

Patented May 21, 1918.

Application filed. June 20, 1917. Serial No. 175,841.

To all whom it may concern:

Be it known that 1, DAVID G. MORGAN, a citizen of the United States, residing at the city and county of San Francisco and State of California, have invented new and useful Improvements in Machines for Making Automobile-Bumpers, of which the following is a specification.

This invention relates to the manufacture of automobile bumpers and more particularly to a device for forming the same.

My object is to provide a simplified and improved machine for forming a spring metal automobile bumper of the type characterized by bent ends each having an eye.

The operation of forming the bumper consists, generally, of laying a heated metal bar in the machine and by means of a pressure die bending each end around a post, retaining said bent end in position and twisting it a quarter turn, and then curving the twisted end'into the required shape to fit. the front end of a side bar of an automobile frame.

One form which my invention may assume is exemplified in the following description and illustrated in the accompanying drawings, in which- Figure 1 shows aplan view of a device embodying my invention.

Fig. 2 shows a sectional view taken on the line 22 of Fig. 1. v

Fig. 3 shows a .detail and inverted plan of the movable post about which the bar is bent to form the eye.

Fig. 4: shows a sectional view of the same.

Fig. 5 shows a detail view of the ad ustable gage plate on the machine.

Fig. 6 shows a detail in perspective of'the movable jaw of one of the bending dies and the detachable handle therefor.

Fig. 7 shows a perspective view of a portion of the eccentric lever for forcing the bending dies home and retaining them in closed position.

Fig. 8 shows a perspective view of the wedge-shaped impression member which fits between the jaws of the bending die.

Fig. 9 shows a detail perspective view of the twisting tool.

Fig. 10 shows a perspective view of the templet for curving the terminus of the bent end of the bar.

Fig. 11 shows a perspective view of the completed bumper.

Referring in detail to the accompanying drawings, the machine comprises a base plate 10, at one or both ends of which is a set of bending dies each comprisinga stationary jaw 11 formed with a curved outer end 12 and an indentation 13. Pivoted to the outer end is a movable jaw 14:, angular in plan and having a curved inner end 15 indented at 16 and a right angularly disposed outer end 17. A post 18, carried by a swinging plate 19 and working in a slot 20, is positioned between the said jaws and a movable wedge-shaped impression block 21 also lies between said jaws. Preferably the latter is removably mounted upon the base plate, being held in position by means of a pin 22 entering an opening 23 in said plate. a

A bar 24 of heated metal is laid in place on the base plate with its end lying between the stationary jaw 11 and the in'ipression block 21 and projecting to one side of the machine, the movable jaw 14 being thrown back, as shown, to the right in Fig. 1 and the post 18 being moved to the outer end of the slot 20. A the movable jaw 14] by means of pins 26 entering apertures 27 in the right angularly disposed end 17 of the jaw, an. thereby the movable jaiv is swung about bending the heated bar around the post 18 and forming an eye 28 therein. 1 The movable jaw should be forced tightly home and held in this position during the subsequentoperations and I provide a lever 29 with a fulcrum pin 30 to enter an aperture in the base plate and having an eccentric head 31 working against the movable jaw and capable of retaining the latter in closed position.

The outer end of the movable jaw CO" operates with a stationary block 32 which is undercut or recessed to receive the bumper bar and retain the samesecurely in position while a twisting tool having a. bifurcated end 3 1 is applied to the projecting end of the bumper bar and given a quarter turn to form'a twist 35 in said bar. Thereafter, and preferably by means of the twisting tool 33, the end of the bar is kinked or bent upwardly to allow a be placed beneath. This templet has one end resting against the block 82 and is clamped in position upon the base plate by means of a crank shaft 37 having a projection 38 to engage the forward end of the templet. The projecting end of the bumper is thereafter hammered or pressed down handle 25 is fitted to curved templet 36 to 7 I register with the mark on the cooling may upon the templet which gives it the required curvature to fit the front end of the side bar of an automobile frame. varies in shape according to the automobile frame for which thebumperis designed.

In laying out the bumper bar it is marked orpunched at specified distances from the ends. These marks or apertures are used to gage the position of the bar inthe press by providing a bowed plate 39 adjustably secured to the base plate near the center thereof and having an attenuated end 40 to bumper bar or enter an apertur 41 therein. The gage plate is made of spring metal and shaped as shown to permit it to yield so that the shifting movement of the bumper bar in not be interferred with. By having said plate adjustably mounted, bumpers of different lengths may be accommodated. Both ends of the base plate may be similarly quipped to form opposite ends of the bumper and many of the tools may be transferred from one end to the other, as for instance the impression member 21, the handle 25, eccentric lever 29 and templet, 36.

The described machine will form any doi sired form of bumper and is cheap to con- "theheated bumper bar around said post g body portion automobile bumpers struct and inexpensive and easy to operate. Various changes in the construction and arrangement of the several parts herein shown and described may be employed without departing from the spirit of my invention asdisclosed in the appended claims. Having thus described my invention, what I claim and desire to securev by Letters Pat-v ent is I i 1. A machine for forming spring metal of the type characterforming an eye, said maa post, means for bending ized by bent ends chine comprising leaving the end projecting at right angles to the body portion, said means comprising a die having pivotally connected aws, one of said jaws being movable and the other Stationary, means for manipulating the movable jaw, means for retaining said jaws in closed position, said movable jaw having a right angularly disposed outer end, and a block against which said end presses the bumper bar whereby to retain the bar in place to permit it to be twisted.

2. A machine whereby a straight headed bar may be formed at each end with an eye and the end portions bentback upon the and projected laterally at right angles thereto and formed with a twisted and bowed terminus comprising a base plate, a-set of bending dies at each end comprising an arcuately movable post and a stationary forming jaw and a movable jaw pivotally connected to the latter and swinging substantially concentric with the path of travel This templet V of said post, said movable jaw having a handle by which itv may be swung around the post compressing the bar into place, and an eccentric lever for forcing the movable jaw home-and retaining it in such position for subsequent operations.

3; A'machine whereby a straight headed bar may be formed at each end with an eye and the end portions bent back upon the body portion and projected laterally at right angles thereto and formed with a twisted and bowed terminus comprising a base plate, a set of bending dies at each end comprising a movable post and a stationary forming jaw and a movable jaw pivotally connected to the latter, said movable jaw having a handle by which it may be swung around the post compressing the bar into place, an eccentric lever for forcing the movable jaw home and retaining it in such position for subsequent operations, the outer end of the movable jaw being right angular-1y dlsposed, and a recessed block against which the bar is pressed by the outer end of the jaw and retained whilea twistis imparted thereto.

4. A machine whereby a straight headed bar may be formed. at eachend with an eye, and the end portions bent back upon the body portion and projected laterally at right angles thereto and formed with-a twisted and bowed terminus comprising a base plate, a set of bending dies ate'ach end comprising an arcuately movable post and a stationary forming jaw and a movab'lejaw pivotally connected to the latter, said movable jaw having a handle by which it may beswung around the post compressing the bar into place, an eccentric lever for forcing the movable jaw home and retaining it in such position for subsequent operations, the outer end of the movable jaw boing'right angularly disposed, and a recessed block against which the bar is pressed by the outer end of the jaw nd retained while a twist'is imparted thereto. 7

5. A machine whereby'a straight headed bar may be formed at each end with an eye and the end portions bent back upon the body portion and projected laterally at right angles thereto and formed with a twisted and bowed terminus comprising a base plate, a set of bending dies at each end comprising a movable post and a stationary forming jaw and a movable jaw pivotally connected to the latter, said movable jaw having a handle by which it may be swung- 6. A machine whereby a straight headed.

bar may b formed a h n with an ey and the end portions bent back upon the body portion and projected laterally at right angles thereto and formed with a twisted and bowed terminus comprising a base plate, a set of bending dies at each end comprising an arcuately floating post and a stationary forming jaw and a movable jaw pivotally connected to the latter, said movable jaw having a handle by which it'may be swung around the post compressing the bar into place, means for retaining the jaws in closed position, and means for rigidly holding the bar adjacent to its end while bending the projecting end of the bar upwardly and imparting a quarter twist thereto.

7. In a metal working machine, a rigid forming jaw, a movable forming jaw pivoted in relation thereto and between which jaws a metal blank may be bent, an arcuately movable pin adapted to be forced toward the fixed jaw and therebetween by the swinging movement of the pivoted aw and along a path of travel substantially concentric with the axis thereof, thereby causing an eye to be formed by the metal blank at the point at which it is bent.

8. In a metal working machine, a fixed jaw having a forming face against which a metal blank is to be pressed, a movable forming jaw pivoted at one end to one end of the fixed jaw whereby said blank may be bent upon itself as the movable jaw swings toward the fixed jaw, and a wedged-shaped impression block pivotally mounted in relation to the fixed and movable aws and having a freely swinging end adapted to project between the jaws and the doubled portions of the blank whereby said portions may be held apart and caused to conform to the faces of the jaws as they are drawn together.

9. In a metal working machine, a fixed jaw having a forming face against which a metal blank is to be pressed, a movable forming jaw pivoted at one end to one end of the fixed jaw whereby said blank may be bent upon itself as the movable jaw Copies of this patent may be obtained for five cents each, by addressing the swings toward the fixed jaw, detachably pivoted means whereby the double portions of the blank may be held apart from each other and caused to conform to the faces of the two jaws as they are forced together and whereby the pressure exerted by the movable jaw will be uniformly distributed to the portion of the blank against the forming faces of both jaws.

10. In a metal working machine, a pair of forming jaws pivoted in relation to each other between which a metal blank may be bent and a freely moving impression block interposed between said jaws and pivoted in relation thereto whereby the pressure exerted to draw the jaws together will act to force the metal blank outwardly against the adjacent forming faces of the jaws.

11. In a metal working machine, a pair of forming jaws pivoted in relation to each other between which a metal blank may be bent, a freely moving impression block interposed between said jaws whereby the pressure exerted to draw the jaws together will act to force the metal blank outwardly against the adjacent forming faces of the jaws, and an arcuately swinging pin where. by an eye may be formed at the bend of the blank and between the jaws.

12. In a metal working machine, a fixed forming jaw, an arcuately moving pin adjacent one end thereof, a movable forming jaw pivoted to the same end of said fixed jaw and adapted to swing partially around the pin whereby a around the pin and a movable impression block pivotally mounted in relation to said jaws whereby the pressure upon the pivoted jaw will cause the blank to assume the contour of the forming faces of the two jaws.

In testimony whereof I have hereunto set my hand in the presence of two subscribing witnesses.

DAVID G. MORGAN.

Witnesses:

JOHN H. HERRING, W. W. HEALEY.

Commissioner of Patents,

Washington, D. G.

metal blank may be bent 

